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<div id="overview"><a href="../../../../../apidocs/org/goda/time/chrono/BasicMonthOfYearDateTimeField.html">View Javadoc</a></div><pre>

<a name="1" href="#1">1</a>   <em class="jxr_comment">/*</em>
<a name="2" href="#2">2</a>   <em class="jxr_comment"> *  Copyright 2001-2005 Stephen Colebourne</em>
<a name="3" href="#3">3</a>   <em class="jxr_comment"> *</em>
<a name="4" href="#4">4</a>   <em class="jxr_comment"> *  Licensed under the Apache License, Version 2.0 (the "License");</em>
<a name="5" href="#5">5</a>   <em class="jxr_comment"> *  you may not use this file except in compliance with the License.</em>
<a name="6" href="#6">6</a>   <em class="jxr_comment"> *  You may obtain a copy of the License at</em>
<a name="7" href="#7">7</a>   <em class="jxr_comment"> *</em>
<a name="8" href="#8">8</a>   <em class="jxr_comment"> *      <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
<a name="9" href="#9">9</a>   <em class="jxr_comment"> *</em>
<a name="10" href="#10">10</a>  <em class="jxr_comment"> *  Unless required by applicable law or agreed to in writing, software</em>
<a name="11" href="#11">11</a>  <em class="jxr_comment"> *  distributed under the License is distributed on an "AS IS" BASIS,</em>
<a name="12" href="#12">12</a>  <em class="jxr_comment"> *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</em>
<a name="13" href="#13">13</a>  <em class="jxr_comment"> *  See the License for the specific language governing permissions and</em>
<a name="14" href="#14">14</a>  <em class="jxr_comment"> *  limitations under the License.</em>
<a name="15" href="#15">15</a>  <em class="jxr_comment"> */</em>
<a name="16" href="#16">16</a>  <strong class="jxr_keyword">package</strong> org.goda.time.chrono;
<a name="17" href="#17">17</a>  
<a name="18" href="#18">18</a>  <strong class="jxr_keyword">import</strong> org.goda.time.DateTimeConstants;
<a name="19" href="#19">19</a>  <strong class="jxr_keyword">import</strong> org.goda.time.DateTimeFieldType;
<a name="20" href="#20">20</a>  <strong class="jxr_keyword">import</strong> org.goda.time.DateTimeUtils;
<a name="21" href="#21">21</a>  <strong class="jxr_keyword">import</strong> org.goda.time.DurationField;
<a name="22" href="#22">22</a>  <strong class="jxr_keyword">import</strong> org.goda.time.ReadablePartial;
<a name="23" href="#23">23</a>  <strong class="jxr_keyword">import</strong> org.goda.time.field.FieldUtils;
<a name="24" href="#24">24</a>  <strong class="jxr_keyword">import</strong> org.goda.time.field.ImpreciseDateTimeField;
<a name="25" href="#25">25</a>  
<a name="26" href="#26">26</a>  <em class="jxr_javadoccomment">/**</em>
<a name="27" href="#27">27</a>  <em class="jxr_javadoccomment"> * Provides time calculations for the month of the year component of time.</em>
<a name="28" href="#28">28</a>  <em class="jxr_javadoccomment"> *</em>
<a name="29" href="#29">29</a>  <em class="jxr_javadoccomment"> * @author Guy Allard</em>
<a name="30" href="#30">30</a>  <em class="jxr_javadoccomment"> * @author Stephen Colebourne</em>
<a name="31" href="#31">31</a>  <em class="jxr_javadoccomment"> * @author Brian S O'Neill</em>
<a name="32" href="#32">32</a>  <em class="jxr_javadoccomment"> * @since 1.2, refactored from GJMonthOfYearDateTimeField</em>
<a name="33" href="#33">33</a>  <em class="jxr_javadoccomment"> */</em>
<a name="34" href="#34">34</a>  <strong class="jxr_keyword">class</strong> <a href="../../../../org/goda/time/chrono/BasicMonthOfYearDateTimeField.html">BasicMonthOfYearDateTimeField</a> <strong class="jxr_keyword">extends</strong> <a href="../../../../org/goda/time/field/ImpreciseDateTimeField.html">ImpreciseDateTimeField</a> {
<a name="35" href="#35">35</a>  
<a name="36" href="#36">36</a>      <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> Serialization version */</em>
<a name="37" href="#37">37</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">long</strong> serialVersionUID = -8258715387168736L;
<a name="38" href="#38">38</a>  
<a name="39" href="#39">39</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> MIN = DateTimeConstants.JANUARY;
<a name="40" href="#40">40</a>  
<a name="41" href="#41">41</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../org/goda/time/chrono/BasicChronology.html">BasicChronology</a> iChronology;
<a name="42" href="#42">42</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> iMax;
<a name="43" href="#43">43</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> iLeapMonth;
<a name="44" href="#44">44</a>  
<a name="45" href="#45">45</a>      <em class="jxr_javadoccomment">/**</em>
<a name="46" href="#46">46</a>  <em class="jxr_javadoccomment">     * Restricted constructor.</em>
<a name="47" href="#47">47</a>  <em class="jxr_javadoccomment">     * </em>
<a name="48" href="#48">48</a>  <em class="jxr_javadoccomment">     * @param leapMonth the month of year that leaps</em>
<a name="49" href="#49">49</a>  <em class="jxr_javadoccomment">     */</em>
<a name="50" href="#50">50</a>      <a href="../../../../org/goda/time/chrono/BasicMonthOfYearDateTimeField.html">BasicMonthOfYearDateTimeField</a>(<a href="../../../../org/goda/time/chrono/BasicChronology.html">BasicChronology</a> chronology, <strong class="jxr_keyword">int</strong> leapMonth) {
<a name="51" href="#51">51</a>          <strong class="jxr_keyword">super</strong>(DateTimeFieldType.monthOfYear(), chronology.getAverageMillisPerMonth());
<a name="52" href="#52">52</a>          iChronology = chronology;
<a name="53" href="#53">53</a>          iMax = iChronology.getMaxMonth();
<a name="54" href="#54">54</a>          iLeapMonth = leapMonth;
<a name="55" href="#55">55</a>      }
<a name="56" href="#56">56</a>  
<a name="57" href="#57">57</a>      <em class="jxr_comment">//-----------------------------------------------------------------------</em>
<a name="58" href="#58">58</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> isLenient() {
<a name="59" href="#59">59</a>          <strong class="jxr_keyword">return</strong> false;
<a name="60" href="#60">60</a>      }
<a name="61" href="#61">61</a>  
<a name="62" href="#62">62</a>      <em class="jxr_comment">//-----------------------------------------------------------------------</em>
<a name="63" href="#63">63</a>      <em class="jxr_javadoccomment">/**</em>
<a name="64" href="#64">64</a>  <em class="jxr_javadoccomment">     * Get the Month component of the specified time instant.</em>
<a name="65" href="#65">65</a>  <em class="jxr_javadoccomment">     *</em>
<a name="66" href="#66">66</a>  <em class="jxr_javadoccomment">     * @see org.joda.time.DateTimeField#get(long)</em>
<a name="67" href="#67">67</a>  <em class="jxr_javadoccomment">     * @see org.joda.time.ReadableDateTime#getMonthOfYear()</em>
<a name="68" href="#68">68</a>  <em class="jxr_javadoccomment">     * @param instant  the time instant in millis to query.</em>
<a name="69" href="#69">69</a>  <em class="jxr_javadoccomment">     * @return the month extracted from the input.</em>
<a name="70" href="#70">70</a>  <em class="jxr_javadoccomment">     */</em>
<a name="71" href="#71">71</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">int</strong> get(<strong class="jxr_keyword">long</strong> instant) {
<a name="72" href="#72">72</a>          <strong class="jxr_keyword">return</strong> iChronology.getMonthOfYear(instant);
<a name="73" href="#73">73</a>      }
<a name="74" href="#74">74</a>  
<a name="75" href="#75">75</a>      <em class="jxr_comment">//-----------------------------------------------------------------------</em>
<a name="76" href="#76">76</a>      <em class="jxr_javadoccomment">/**</em>
<a name="77" href="#77">77</a>  <em class="jxr_javadoccomment">     * Add the specified month to the specified time instant.</em>
<a name="78" href="#78">78</a>  <em class="jxr_javadoccomment">     * The amount added may be negative.&lt;p&gt;</em>
<a name="79" href="#79">79</a>  <em class="jxr_javadoccomment">     * If the new month has less total days than the specified</em>
<a name="80" href="#80">80</a>  <em class="jxr_javadoccomment">     * day of the month, this value is coerced to the nearest</em>
<a name="81" href="#81">81</a>  <em class="jxr_javadoccomment">     * sane value. e.g.&lt;p&gt;</em>
<a name="82" href="#82">82</a>  <em class="jxr_javadoccomment">     * 07-31 - (1 month) = 06-30&lt;p&gt;</em>
<a name="83" href="#83">83</a>  <em class="jxr_javadoccomment">     * 03-31 - (1 month) = 02-28 or 02-29 depending&lt;p&gt;</em>
<a name="84" href="#84">84</a>  <em class="jxr_javadoccomment">     * </em>
<a name="85" href="#85">85</a>  <em class="jxr_javadoccomment">     * @see org.joda.time.DateTimeField#add</em>
<a name="86" href="#86">86</a>  <em class="jxr_javadoccomment">     * @see org.joda.time.ReadWritableDateTime#addMonths(int)</em>
<a name="87" href="#87">87</a>  <em class="jxr_javadoccomment">     * @param instant  the time instant in millis to update.</em>
<a name="88" href="#88">88</a>  <em class="jxr_javadoccomment">     * @param months  the months to add (can be negative).</em>
<a name="89" href="#89">89</a>  <em class="jxr_javadoccomment">     * @return the updated time instant.</em>
<a name="90" href="#90">90</a>  <em class="jxr_javadoccomment">     */</em>
<a name="91" href="#91">91</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">long</strong> add(<strong class="jxr_keyword">long</strong> instant, <strong class="jxr_keyword">int</strong> months) {
<a name="92" href="#92">92</a>          <strong class="jxr_keyword">if</strong> (months == 0) {
<a name="93" href="#93">93</a>              <strong class="jxr_keyword">return</strong> instant; <em class="jxr_comment">// the easy case</em>
<a name="94" href="#94">94</a>          }
<a name="95" href="#95">95</a>          <em class="jxr_comment">//</em>
<a name="96" href="#96">96</a>          <em class="jxr_comment">// Save time part first.</em>
<a name="97" href="#97">97</a>          <em class="jxr_comment">//</em>
<a name="98" href="#98">98</a>          <strong class="jxr_keyword">long</strong> timePart = iChronology.getMillisOfDay(instant);
<a name="99" href="#99">99</a>          <em class="jxr_comment">//</em>
<a name="100" href="#100">100</a>         <em class="jxr_comment">//</em>
<a name="101" href="#101">101</a>         <em class="jxr_comment">// Get this year and month.</em>
<a name="102" href="#102">102</a>         <em class="jxr_comment">//</em>
<a name="103" href="#103">103</a>         <strong class="jxr_keyword">int</strong> thisYear = iChronology.getYear(instant);
<a name="104" href="#104">104</a>         <strong class="jxr_keyword">int</strong> thisMonth = iChronology.getMonthOfYear(instant, thisYear);
<a name="105" href="#105">105</a>         <em class="jxr_comment">// ----------------------------------------------------------</em>
<a name="106" href="#106">106</a>         <em class="jxr_comment">//</em>
<a name="107" href="#107">107</a>         <em class="jxr_comment">// Do not refactor without careful consideration.</em>
<a name="108" href="#108">108</a>         <em class="jxr_comment">// Order of calculation is important.</em>
<a name="109" href="#109">109</a>         <em class="jxr_comment">//</em>
<a name="110" href="#110">110</a>         <strong class="jxr_keyword">int</strong> yearToUse;
<a name="111" href="#111">111</a>         <em class="jxr_comment">// Initially, monthToUse is zero-based</em>
<a name="112" href="#112">112</a>         <strong class="jxr_keyword">int</strong> monthToUse = thisMonth - 1 + months;
<a name="113" href="#113">113</a>         <strong class="jxr_keyword">if</strong> (monthToUse &gt;= 0) {
<a name="114" href="#114">114</a>             yearToUse = thisYear + (monthToUse / iMax);
<a name="115" href="#115">115</a>             monthToUse = (monthToUse % iMax) + 1;
<a name="116" href="#116">116</a>         } <strong class="jxr_keyword">else</strong> {
<a name="117" href="#117">117</a>             yearToUse = thisYear + (monthToUse / iMax) - 1;
<a name="118" href="#118">118</a>             monthToUse = Math.abs(monthToUse);
<a name="119" href="#119">119</a>             <strong class="jxr_keyword">int</strong> remMonthToUse = monthToUse % iMax;
<a name="120" href="#120">120</a>             <em class="jxr_comment">// Take care of the boundary condition</em>
<a name="121" href="#121">121</a>             <strong class="jxr_keyword">if</strong> (remMonthToUse == 0) {
<a name="122" href="#122">122</a>                 remMonthToUse = iMax;
<a name="123" href="#123">123</a>             }
<a name="124" href="#124">124</a>             monthToUse = iMax - remMonthToUse + 1;
<a name="125" href="#125">125</a>             <em class="jxr_comment">// Take care of the boundary condition</em>
<a name="126" href="#126">126</a>             <strong class="jxr_keyword">if</strong> (monthToUse == 1) {
<a name="127" href="#127">127</a>                 yearToUse += 1;
<a name="128" href="#128">128</a>             }
<a name="129" href="#129">129</a>         }
<a name="130" href="#130">130</a>         <em class="jxr_comment">// End of do not refactor.</em>
<a name="131" href="#131">131</a>         <em class="jxr_comment">// ----------------------------------------------------------</em>
<a name="132" href="#132">132</a> 
<a name="133" href="#133">133</a>         <em class="jxr_comment">//</em>
<a name="134" href="#134">134</a>         <em class="jxr_comment">// Quietly force DOM to nearest sane value.</em>
<a name="135" href="#135">135</a>         <em class="jxr_comment">//</em>
<a name="136" href="#136">136</a>         <strong class="jxr_keyword">int</strong> dayToUse = iChronology.getDayOfMonth(instant, thisYear, thisMonth);
<a name="137" href="#137">137</a>         <strong class="jxr_keyword">int</strong> maxDay = iChronology.getDaysInYearMonth(yearToUse, monthToUse);
<a name="138" href="#138">138</a>         <strong class="jxr_keyword">if</strong> (dayToUse &gt; maxDay) {
<a name="139" href="#139">139</a>             dayToUse = maxDay;
<a name="140" href="#140">140</a>         }
<a name="141" href="#141">141</a>         <em class="jxr_comment">//</em>
<a name="142" href="#142">142</a>         <em class="jxr_comment">// get proper date part, and return result</em>
<a name="143" href="#143">143</a>         <em class="jxr_comment">//</em>
<a name="144" href="#144">144</a>         <strong class="jxr_keyword">long</strong> datePart =
<a name="145" href="#145">145</a>             iChronology.getYearMonthDayMillis(yearToUse, monthToUse, dayToUse);
<a name="146" href="#146">146</a>         <strong class="jxr_keyword">return</strong> datePart + timePart;
<a name="147" href="#147">147</a>     }
<a name="148" href="#148">148</a> 
<a name="149" href="#149">149</a>     <em class="jxr_comment">//-----------------------------------------------------------------------</em>
<a name="150" href="#150">150</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">long</strong> add(<strong class="jxr_keyword">long</strong> instant, <strong class="jxr_keyword">long</strong> months) {
<a name="151" href="#151">151</a>         <strong class="jxr_keyword">int</strong> i_months = (<strong class="jxr_keyword">int</strong>)months;
<a name="152" href="#152">152</a>         <strong class="jxr_keyword">if</strong> (i_months == months) {
<a name="153" href="#153">153</a>             <strong class="jxr_keyword">return</strong> add(instant, i_months);
<a name="154" href="#154">154</a>         }
<a name="155" href="#155">155</a> 
<a name="156" href="#156">156</a>         <em class="jxr_comment">// Copied from add(long, int) and modified slightly:</em>
<a name="157" href="#157">157</a> 
<a name="158" href="#158">158</a>         <strong class="jxr_keyword">long</strong> timePart = iChronology.getMillisOfDay(instant);
<a name="159" href="#159">159</a> 
<a name="160" href="#160">160</a>         <strong class="jxr_keyword">int</strong> thisYear = iChronology.getYear(instant);
<a name="161" href="#161">161</a>         <strong class="jxr_keyword">int</strong> thisMonth = iChronology.getMonthOfYear(instant, thisYear);
<a name="162" href="#162">162</a> 
<a name="163" href="#163">163</a>         <strong class="jxr_keyword">long</strong> yearToUse;
<a name="164" href="#164">164</a>         <strong class="jxr_keyword">long</strong> monthToUse = thisMonth - 1 + months;
<a name="165" href="#165">165</a>         <strong class="jxr_keyword">if</strong> (monthToUse &gt;= 0) {
<a name="166" href="#166">166</a>             yearToUse = thisYear + (monthToUse / iMax);
<a name="167" href="#167">167</a>             monthToUse = (monthToUse % iMax) + 1;
<a name="168" href="#168">168</a>         } <strong class="jxr_keyword">else</strong> {
<a name="169" href="#169">169</a>             yearToUse = thisYear + (monthToUse / iMax) - 1;
<a name="170" href="#170">170</a>             monthToUse = Math.abs(monthToUse);
<a name="171" href="#171">171</a>             <strong class="jxr_keyword">int</strong> remMonthToUse = (<strong class="jxr_keyword">int</strong>)(monthToUse % iMax);
<a name="172" href="#172">172</a>             <strong class="jxr_keyword">if</strong> (remMonthToUse == 0) {
<a name="173" href="#173">173</a>                 remMonthToUse = iMax;
<a name="174" href="#174">174</a>             }
<a name="175" href="#175">175</a>             monthToUse = iMax - remMonthToUse + 1;
<a name="176" href="#176">176</a>             <strong class="jxr_keyword">if</strong> (monthToUse == 1) {
<a name="177" href="#177">177</a>                 yearToUse += 1;
<a name="178" href="#178">178</a>             }
<a name="179" href="#179">179</a>         }
<a name="180" href="#180">180</a> 
<a name="181" href="#181">181</a>         <strong class="jxr_keyword">if</strong> (yearToUse &lt; iChronology.getMinYear() ||
<a name="182" href="#182">182</a>             yearToUse &gt; iChronology.getMaxYear()) {
<a name="183" href="#183">183</a> 
<a name="184" href="#184">184</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalArgumentException
<a name="185" href="#185">185</a>                 (<span class="jxr_string">"Magnitude of add amount is too large: "</span> + months);
<a name="186" href="#186">186</a>         }
<a name="187" href="#187">187</a> 
<a name="188" href="#188">188</a>         <strong class="jxr_keyword">int</strong> i_yearToUse = (<strong class="jxr_keyword">int</strong>)yearToUse;
<a name="189" href="#189">189</a>         <strong class="jxr_keyword">int</strong> i_monthToUse = (<strong class="jxr_keyword">int</strong>)monthToUse;
<a name="190" href="#190">190</a> 
<a name="191" href="#191">191</a>         <strong class="jxr_keyword">int</strong> dayToUse = iChronology.getDayOfMonth(instant, thisYear, thisMonth);
<a name="192" href="#192">192</a>         <strong class="jxr_keyword">int</strong> maxDay = iChronology.getDaysInYearMonth(i_yearToUse, i_monthToUse);
<a name="193" href="#193">193</a>         <strong class="jxr_keyword">if</strong> (dayToUse &gt; maxDay) {
<a name="194" href="#194">194</a>             dayToUse = maxDay;
<a name="195" href="#195">195</a>         }
<a name="196" href="#196">196</a> 
<a name="197" href="#197">197</a>         <strong class="jxr_keyword">long</strong> datePart =
<a name="198" href="#198">198</a>             iChronology.getYearMonthDayMillis(i_yearToUse, i_monthToUse, dayToUse);
<a name="199" href="#199">199</a>         <strong class="jxr_keyword">return</strong> datePart + timePart;
<a name="200" href="#200">200</a>     }
<a name="201" href="#201">201</a> 
<a name="202" href="#202">202</a>     <em class="jxr_comment">//-----------------------------------------------------------------------</em>
<a name="203" href="#203">203</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">int</strong>[] add(<a href="../../../../org/goda/time/ReadablePartial.html">ReadablePartial</a> partial, <strong class="jxr_keyword">int</strong> fieldIndex, <strong class="jxr_keyword">int</strong>[] values, <strong class="jxr_keyword">int</strong> valueToAdd) {
<a name="204" href="#204">204</a>         <em class="jxr_comment">// overridden as superclass algorithm can't handle</em>
<a name="205" href="#205">205</a>         <em class="jxr_comment">// 2004-02-29 + 48 months -&gt; 2008-02-29 type dates</em>
<a name="206" href="#206">206</a>         <strong class="jxr_keyword">if</strong> (valueToAdd == 0) {
<a name="207" href="#207">207</a>             <strong class="jxr_keyword">return</strong> values;
<a name="208" href="#208">208</a>         }
<a name="209" href="#209">209</a>         <strong class="jxr_keyword">if</strong> (DateTimeUtils.isContiguous(partial)) {
<a name="210" href="#210">210</a>             <strong class="jxr_keyword">long</strong> instant = 0L;
<a name="211" href="#211">211</a>             <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0, isize = partial.size(); i &lt; isize; i++) {
<a name="212" href="#212">212</a>                 instant = partial.getFieldType(i).getField(iChronology).set(instant, values[i]);
<a name="213" href="#213">213</a>             }
<a name="214" href="#214">214</a>             instant = add(instant, valueToAdd);
<a name="215" href="#215">215</a>             <strong class="jxr_keyword">return</strong> iChronology.get(partial, instant);
<a name="216" href="#216">216</a>         } <strong class="jxr_keyword">else</strong> {
<a name="217" href="#217">217</a>             <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">super</strong>.add(partial, fieldIndex, values, valueToAdd);
<a name="218" href="#218">218</a>         }
<a name="219" href="#219">219</a>     }
<a name="220" href="#220">220</a> 
<a name="221" href="#221">221</a>     <em class="jxr_comment">//-----------------------------------------------------------------------</em>
<a name="222" href="#222">222</a>     <em class="jxr_javadoccomment">/**</em>
<a name="223" href="#223">223</a> <em class="jxr_javadoccomment">     * Add to the Month component of the specified time instant</em>
<a name="224" href="#224">224</a> <em class="jxr_javadoccomment">     * wrapping around within that component if necessary.</em>
<a name="225" href="#225">225</a> <em class="jxr_javadoccomment">     * </em>
<a name="226" href="#226">226</a> <em class="jxr_javadoccomment">     * @see org.joda.time.DateTimeField#addWrapField</em>
<a name="227" href="#227">227</a> <em class="jxr_javadoccomment">     * @param instant  the time instant in millis to update.</em>
<a name="228" href="#228">228</a> <em class="jxr_javadoccomment">     * @param months  the months to add (can be negative).</em>
<a name="229" href="#229">229</a> <em class="jxr_javadoccomment">     * @return the updated time instant.</em>
<a name="230" href="#230">230</a> <em class="jxr_javadoccomment">     */</em>
<a name="231" href="#231">231</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">long</strong> addWrapField(<strong class="jxr_keyword">long</strong> instant, <strong class="jxr_keyword">int</strong> months) {
<a name="232" href="#232">232</a>         <strong class="jxr_keyword">return</strong> set(instant, FieldUtils.getWrappedValue(get(instant), months, MIN, iMax));
<a name="233" href="#233">233</a>     }
<a name="234" href="#234">234</a> 
<a name="235" href="#235">235</a>     <em class="jxr_comment">//-----------------------------------------------------------------------</em>
<a name="236" href="#236">236</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">long</strong> getDifferenceAsLong(<strong class="jxr_keyword">long</strong> minuendInstant, <strong class="jxr_keyword">long</strong> subtrahendInstant) {
<a name="237" href="#237">237</a>         <strong class="jxr_keyword">if</strong> (minuendInstant &lt; subtrahendInstant) {
<a name="238" href="#238">238</a>             <strong class="jxr_keyword">return</strong> -getDifference(subtrahendInstant, minuendInstant);
<a name="239" href="#239">239</a>         }
<a name="240" href="#240">240</a> 
<a name="241" href="#241">241</a>         <strong class="jxr_keyword">int</strong> minuendYear = iChronology.getYear(minuendInstant);
<a name="242" href="#242">242</a>         <strong class="jxr_keyword">int</strong> minuendMonth = iChronology.getMonthOfYear(minuendInstant, minuendYear);
<a name="243" href="#243">243</a>         <strong class="jxr_keyword">int</strong> subtrahendYear = iChronology.getYear(subtrahendInstant);
<a name="244" href="#244">244</a>         <strong class="jxr_keyword">int</strong> subtrahendMonth = iChronology.getMonthOfYear(subtrahendInstant, subtrahendYear);
<a name="245" href="#245">245</a> 
<a name="246" href="#246">246</a>         <strong class="jxr_keyword">long</strong> difference = (minuendYear - subtrahendYear) * ((<strong class="jxr_keyword">long</strong>) iMax) + minuendMonth - subtrahendMonth;
<a name="247" href="#247">247</a> 
<a name="248" href="#248">248</a>         <em class="jxr_comment">// Before adjusting for remainder, account for special case of add</em>
<a name="249" href="#249">249</a>         <em class="jxr_comment">// where the day-of-month is forced to the nearest sane value.</em>
<a name="250" href="#250">250</a>         <strong class="jxr_keyword">int</strong> minuendDom = iChronology.getDayOfMonth
<a name="251" href="#251">251</a>             (minuendInstant, minuendYear, minuendMonth);
<a name="252" href="#252">252</a>         <strong class="jxr_keyword">if</strong> (minuendDom == iChronology.getDaysInYearMonth(minuendYear, minuendMonth)) {
<a name="253" href="#253">253</a>             <em class="jxr_comment">// Last day of the minuend month...</em>
<a name="254" href="#254">254</a>             <strong class="jxr_keyword">int</strong> subtrahendDom = iChronology.getDayOfMonth
<a name="255" href="#255">255</a>                 (subtrahendInstant, subtrahendYear, subtrahendMonth);
<a name="256" href="#256">256</a>             <strong class="jxr_keyword">if</strong> (subtrahendDom &gt; minuendDom) {
<a name="257" href="#257">257</a>                 <em class="jxr_comment">// ...and day of subtrahend month is larger.</em>
<a name="258" href="#258">258</a>                 <em class="jxr_comment">// Note: This works fine, but it ideally shouldn't invoke other</em>
<a name="259" href="#259">259</a>                 <em class="jxr_comment">// fields from within a field.</em>
<a name="260" href="#260">260</a>                 subtrahendInstant = iChronology.dayOfMonth().set(subtrahendInstant, minuendDom);
<a name="261" href="#261">261</a>             }
<a name="262" href="#262">262</a>         }
<a name="263" href="#263">263</a> 
<a name="264" href="#264">264</a>         <em class="jxr_comment">// Inlined remainder method to avoid duplicate calls.</em>
<a name="265" href="#265">265</a>         <strong class="jxr_keyword">long</strong> minuendRem = minuendInstant
<a name="266" href="#266">266</a>             - iChronology.getYearMonthMillis(minuendYear, minuendMonth);
<a name="267" href="#267">267</a>         <strong class="jxr_keyword">long</strong> subtrahendRem = subtrahendInstant
<a name="268" href="#268">268</a>             - iChronology.getYearMonthMillis(subtrahendYear, subtrahendMonth);
<a name="269" href="#269">269</a> 
<a name="270" href="#270">270</a>         <strong class="jxr_keyword">if</strong> (minuendRem &lt; subtrahendRem) {
<a name="271" href="#271">271</a>             difference--;
<a name="272" href="#272">272</a>         }
<a name="273" href="#273">273</a> 
<a name="274" href="#274">274</a>         <strong class="jxr_keyword">return</strong> difference;
<a name="275" href="#275">275</a>     }
<a name="276" href="#276">276</a> 
<a name="277" href="#277">277</a>     <em class="jxr_comment">//-----------------------------------------------------------------------</em>
<a name="278" href="#278">278</a>     <em class="jxr_javadoccomment">/**</em>
<a name="279" href="#279">279</a> <em class="jxr_javadoccomment">     * Set the Month component of the specified time instant.&lt;p&gt;</em>
<a name="280" href="#280">280</a> <em class="jxr_javadoccomment">     * If the new month has less total days than the specified</em>
<a name="281" href="#281">281</a> <em class="jxr_javadoccomment">     * day of the month, this value is coerced to the nearest</em>
<a name="282" href="#282">282</a> <em class="jxr_javadoccomment">     * sane value. e.g.&lt;p&gt;</em>
<a name="283" href="#283">283</a> <em class="jxr_javadoccomment">     * 07-31 to month 6 = 06-30&lt;p&gt;</em>
<a name="284" href="#284">284</a> <em class="jxr_javadoccomment">     * 03-31 to month 2 = 02-28 or 02-29 depending&lt;p&gt;</em>
<a name="285" href="#285">285</a> <em class="jxr_javadoccomment">     * </em>
<a name="286" href="#286">286</a> <em class="jxr_javadoccomment">     * @param instant  the time instant in millis to update.</em>
<a name="287" href="#287">287</a> <em class="jxr_javadoccomment">     * @param month  the month (1,12) to update the time to.</em>
<a name="288" href="#288">288</a> <em class="jxr_javadoccomment">     * @return the updated time instant.</em>
<a name="289" href="#289">289</a> <em class="jxr_javadoccomment">     * @throws IllegalArgumentException  if month is invalid</em>
<a name="290" href="#290">290</a> <em class="jxr_javadoccomment">     */</em>
<a name="291" href="#291">291</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">long</strong> set(<strong class="jxr_keyword">long</strong> instant, <strong class="jxr_keyword">int</strong> month) {
<a name="292" href="#292">292</a>         FieldUtils.verifyValueBounds(<strong class="jxr_keyword">this</strong>, month, MIN, iMax);
<a name="293" href="#293">293</a>         <em class="jxr_comment">//</em>
<a name="294" href="#294">294</a>         <strong class="jxr_keyword">int</strong> thisYear = iChronology.getYear(instant);
<a name="295" href="#295">295</a>         <em class="jxr_comment">//</em>
<a name="296" href="#296">296</a>         <strong class="jxr_keyword">int</strong> thisDom = iChronology.getDayOfMonth(instant, thisYear);
<a name="297" href="#297">297</a>         <strong class="jxr_keyword">int</strong> maxDom = iChronology.getDaysInYearMonth(thisYear, month);
<a name="298" href="#298">298</a>         <strong class="jxr_keyword">if</strong> (thisDom &gt; maxDom) {
<a name="299" href="#299">299</a>             <em class="jxr_comment">// Quietly force DOM to nearest sane value.</em>
<a name="300" href="#300">300</a>             thisDom = maxDom;
<a name="301" href="#301">301</a>         }
<a name="302" href="#302">302</a>         <em class="jxr_comment">// Return newly calculated millis value</em>
<a name="303" href="#303">303</a>         <strong class="jxr_keyword">return</strong> iChronology.getYearMonthDayMillis(thisYear, month, thisDom) +
<a name="304" href="#304">304</a>             iChronology.getMillisOfDay(instant);
<a name="305" href="#305">305</a>     }
<a name="306" href="#306">306</a> 
<a name="307" href="#307">307</a>     <em class="jxr_comment">//-----------------------------------------------------------------------</em>
<a name="308" href="#308">308</a>     <strong class="jxr_keyword">public</strong> <a href="../../../../org/goda/time/DurationField.html">DurationField</a> getRangeDurationField() {
<a name="309" href="#309">309</a>         <strong class="jxr_keyword">return</strong> iChronology.years();
<a name="310" href="#310">310</a>     }
<a name="311" href="#311">311</a> 
<a name="312" href="#312">312</a>     <em class="jxr_comment">//-----------------------------------------------------------------------</em>
<a name="313" href="#313">313</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> isLeap(<strong class="jxr_keyword">long</strong> instant) {
<a name="314" href="#314">314</a>         <strong class="jxr_keyword">int</strong> thisYear = iChronology.getYear(instant);
<a name="315" href="#315">315</a>         <strong class="jxr_keyword">if</strong> (iChronology.isLeapYear(thisYear)) {
<a name="316" href="#316">316</a>             <strong class="jxr_keyword">return</strong> (iChronology.getMonthOfYear(instant, thisYear) == iLeapMonth);
<a name="317" href="#317">317</a>         }
<a name="318" href="#318">318</a>         <strong class="jxr_keyword">return</strong> false;
<a name="319" href="#319">319</a>     }
<a name="320" href="#320">320</a> 
<a name="321" href="#321">321</a>     <em class="jxr_comment">//-----------------------------------------------------------------------</em>
<a name="322" href="#322">322</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">int</strong> getLeapAmount(<strong class="jxr_keyword">long</strong> instant) {
<a name="323" href="#323">323</a>         <strong class="jxr_keyword">return</strong> isLeap(instant) ? 1 : 0;
<a name="324" href="#324">324</a>     }
<a name="325" href="#325">325</a> 
<a name="326" href="#326">326</a>     <em class="jxr_comment">//-----------------------------------------------------------------------</em>
<a name="327" href="#327">327</a>     <strong class="jxr_keyword">public</strong> <a href="../../../../org/goda/time/DurationField.html">DurationField</a> getLeapDurationField() {
<a name="328" href="#328">328</a>         <strong class="jxr_keyword">return</strong> iChronology.days();
<a name="329" href="#329">329</a>     }
<a name="330" href="#330">330</a> 
<a name="331" href="#331">331</a>     <em class="jxr_comment">//-----------------------------------------------------------------------</em>
<a name="332" href="#332">332</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">int</strong> getMinimumValue() {
<a name="333" href="#333">333</a>         <strong class="jxr_keyword">return</strong> MIN;
<a name="334" href="#334">334</a>     }
<a name="335" href="#335">335</a> 
<a name="336" href="#336">336</a>     <em class="jxr_comment">//-----------------------------------------------------------------------</em>
<a name="337" href="#337">337</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">int</strong> getMaximumValue() {
<a name="338" href="#338">338</a>         <strong class="jxr_keyword">return</strong> iMax;
<a name="339" href="#339">339</a>     }
<a name="340" href="#340">340</a> 
<a name="341" href="#341">341</a>     <em class="jxr_comment">//-----------------------------------------------------------------------</em>
<a name="342" href="#342">342</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">long</strong> roundFloor(<strong class="jxr_keyword">long</strong> instant) {
<a name="343" href="#343">343</a>         <strong class="jxr_keyword">int</strong> year = iChronology.getYear(instant);
<a name="344" href="#344">344</a>         <strong class="jxr_keyword">int</strong> month = iChronology.getMonthOfYear(instant, year);
<a name="345" href="#345">345</a>         <strong class="jxr_keyword">return</strong> iChronology.getYearMonthMillis(year, month);
<a name="346" href="#346">346</a>     }
<a name="347" href="#347">347</a> 
<a name="348" href="#348">348</a>     <em class="jxr_comment">//-----------------------------------------------------------------------</em>
<a name="349" href="#349">349</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">long</strong> remainder(<strong class="jxr_keyword">long</strong> instant) {
<a name="350" href="#350">350</a>         <strong class="jxr_keyword">return</strong> instant - roundFloor(instant);
<a name="351" href="#351">351</a>     }
<a name="352" href="#352">352</a> 
<a name="353" href="#353">353</a>     <em class="jxr_comment">//-----------------------------------------------------------------------</em>
<a name="354" href="#354">354</a>     <em class="jxr_javadoccomment">/**</em>
<a name="355" href="#355">355</a> <em class="jxr_javadoccomment">     * Serialization singleton</em>
<a name="356" href="#356">356</a> <em class="jxr_javadoccomment">     */</em>
<a name="357" href="#357">357</a>     <strong class="jxr_keyword">private</strong> Object readResolve() {
<a name="358" href="#358">358</a>         <strong class="jxr_keyword">return</strong> iChronology.monthOfYear();
<a name="359" href="#359">359</a>     }
<a name="360" href="#360">360</a> }
</pre>
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